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/* Illustrations and explanations of digital audio */
On a side note, the WAV sound container only allows 8-bit unsigned samples, so there is no ambiguity as to how to interpret 8-bit samples.
Note that both (albeit more obvious in the latter) share a feature typical of binary-encoded numbers: there is no exact 'centre' value, because the total number of possible values is even. In the context of audio, this means that, if the signal spanned the entire range, its centre (average) would be slightly off-zero (in this case, below), which is known as a DC offset. However, even if this did occur, it would be negligible and certainly not audible by humans!
The fact there is no 'centre' value is actually a good thing, as the CPC as has to convert the sound signal that comes in to a single bit, determining whether the signal is low or high.
== Duplication of cassettes ==
